{"cve":"CVE-2020-7658","nvd":{"published":"2020-05-22T16:15:10.973","modified":"2026-06-17T03:25:12.867","status":"Modified","description":"meinheld prior to 1.0.2 is vulnerable to HTTP Request Smuggling. HTTP pipelining issues and request smuggling attacks might be possible due to incorrect Content-Length and Transfer encoding header parsing.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-444"],"references":["https://github.com/mopemope/meinheld/blob/master/CHANGES.rst%2C","https://snyk.io/vuln/SNYK-PYTHON-MEINHELD-569140","https://github.com/mopemope/meinheld/blob/master/CHANGES.rst%2C","https://snyk.io/vuln/SNYK-PYTHON-MEINHELD-569140"],"products":["meinheld:meinheld"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-7658","score":0.00686,"percentile":0.5266,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-63h2-9cc8-fc7m","url":"https://osv.dev/vulnerability/GHSA-63h2-9cc8-fc7m","summary":"meinheld vulnerable to HTTP Request Smuggling","modified":"2024-09-25T19:48:35.194099Z","packages":[{"ecosystem":"PyPI","name":"meinheld","purl":"pkg:pypi/meinheld","ranges":["<1.0.2"],"fixed":["1.0.2"]}]},{"id":"PYSEC-2020-239","url":"https://osv.dev/vulnerability/PYSEC-2020-239","summary":"","modified":"2026-06-10T17:02:08.894050029Z","packages":[{"ecosystem":"PyPI","name":"meinheld","purl":"pkg:pypi/meinheld","ranges":["<1.0.2"],"fixed":["1.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}